种植一亿棵树苗

Getting 11 countries to work together is not easy and simply irrigating a 5,000-mile long belt of trees is an ambitious task.

But all over Africa, people are recognising how important it is to have trees as part of their local landscape.

This group of volunteers has planted nearly 100 million saplings.

They are just one of countless similar groups and individuals taking it upon themselves to reforest their own part of this great continent.

Trees are essential for the future of the continent and indeed, to the rest of the planet.

This is the Congo Basin.

It's one of the most biologically important forests on Earth

and it's not just because of the concentration of plants and animals that live here. It's because it's also one of the powerhouses behind the planet's wind and rain.